New direct torque control of DFIG under balanced and unbalanced grid voltage

Pimple, B. B.; Vekhande, Vishal; Fernandes, B. G.

doi:10.1109/tencon.2010.5686748

Cited by 16 publications

(14 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [136], a DTC scheme for voltage unbalances is presented. This method is like [127]- [129] in that it makes use of a PI-R controller to reduce the torque oscillations.…”

Section: Mitigating the Effects Of Unbalanced Grid Voltages On The Dfigmentioning

confidence: 99%

Model predictive control of a doubly fed induction generator

Reddy¹,

Saha²

2021

2021 IEEE PES/IAS PowerAfrica

View full text Add to dashboard Cite

show abstract

“…In [136], a DTC scheme for voltage unbalances is presented. This method is like [127]- [129] in that it makes use of a PI-R controller to reduce the torque oscillations.…”

Section: Mitigating the Effects Of Unbalanced Grid Voltages On The Dfigmentioning

confidence: 99%

Model predictive control of a doubly fed induction generator

Reddy¹,

Saha²

2021

2021 IEEE PES/IAS PowerAfrica

View full text Add to dashboard Cite

show abstract

“…In control scheme, two independent regulating loops are used for rotor flux and torque regulation. The rotor flux regulating loop gives the magnitude of rotor voltage vector V r , whereas the torque regulating loop gives the angle ( δ + α ) [21]. From Fig.…”

Section: Description Of Pvc‐based Dtc Of Dfig Under Balanced Grid Vmentioning

confidence: 99%

“…In [11], the control is achieved using RSC, in which the reference rotor voltages are generated based on the pulsation in the stator active power. In [12], the RSC is controlled in stationary reference frame to reduce the torque pulsation. The error in torque is processed by a resonant regulator along with a PI regulator.…”

Section: Introductionmentioning

confidence: 99%

Compensation of negative sequence stator flux of doubly‐fed induction generator using polar voltage control‐based direct torque control under unbalanced grid voltage condition

Pimple

Vekhande

Fernandes

2015

J. eng.

View full text Add to dashboard Cite

“…The DTC technique is applied to the RSC to control the torque oscillations but the DC bus oscillations and consideration of unbalanced load condition was unaddressed. A new DTC scheme for a DFIG under unbalanced grid voltage condition is proposed in [15]. Independent control of electromagnetic torque and reactive power is achieved by controlling the torque angle (δ) and rotor voltage magnitude because of that the reduction in pulsations of Tem is achievable.…”

Section: Introductionmentioning

confidence: 99%

A Control Strategy for DFIM to Minimize DC Bus Voltage Fluctuations and Torque Oscillations

Madhav

Obulesu

2017

IJEECS

View full text Add to dashboard Cite

The Keywords: doubly fed induction generator, direct power control, rotor connected converter, grid connected converter, torque oscillations cancellationCopyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. IntroductionIn the recent past and also presently the wind energy generation has developed rapidly both in terms of onshore and offshore wind farms. In variable speed wind energy conversion systems, the Doubly Fed Induction Generator (DFIG) is considered to be common solution [1]. The commonly used control technique for these variable speed wind turbines is the Field Oriented Control (FOC) technique [2] but has drawbacks like nature of linearity and lack of robustness when it is subjected to variations in operational conditions. The nonlinear control techniques like Direct Torque Control (DTC) or Direct Power Control (DPC) [3][4][5] have gained importance in the recent past. These techniques are used because of the nature of nonlinearity of the inverter with finite possible states and due to the linear time-varying nature of the DFIG model. The basic principle of these techniques is to control instantaneously the torque or active power and the magnitude of flux or reactive power in one sample time by selecting voltage space vector and an average control signal. In DPC technique, the Rotor Side Converter (RSC) instantaneous switching states are determined based on the active and reactive power measurements made in the stator circuit, which is quite different from the DTC technique i.e., the measurements are taken at one terminal of the DFIG and the switching states are carried at another terminal. There is no necessity of PWM voltages integration in DPC strategy unlike DTC strategy, which leads to stable operation even when rotor frequency is set to zero. The DPC strategy is independent of stator or rotor resistance as it is inherently a position sensor less method.As the DFIG is directly connected to grid, therefore it is more succumbed to faults which generally cause non-sinusoidal output currents, electromagnetic torque (T em ) or power oscillations which leads to more mechanical stress in the wind turbine and ripples in the DClink voltage, unequal heating and power loss. Various methods were proposed to focus on the solution to control DFIG when there is a network unbalance. In [6], a modified Direct Torque Control technique is applied to rotor side frequency converter and the transient behavior of

show abstract

New direct torque control of DFIG under balanced and unbalanced grid voltage

Cited by 16 publications

References 9 publications

Model predictive control of a doubly fed induction generator

Model predictive control of a doubly fed induction generator

Compensation of negative sequence stator flux of doubly‐fed induction generator using polar voltage control‐based direct torque control under unbalanced grid voltage condition

A Control Strategy for DFIM to Minimize DC Bus Voltage Fluctuations and Torque Oscillations

Contact Info

Product

Resources

About